Script to Set Environment Variable?

[ms419@freezone.co.uk]

How do I write a script to set an environment variable?

I feel like I should know this. I want to set my PATH in pbuilder & the 
author suggested using an "A" hook. However, I can't create a hook - an 
executable - which sets an environment variable.

I tried:

	#!/bin/sh
	export PATH=/usr/lib/ccache:$PATH

and just:

	export PATH=/usr/lib/ccache:$PATH

but in either case, calling ./A10hook doesn't change my environment 
variable. I hope I'm just missing something foolishly obvious.

Thanks for any help!

Jack